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Condensation of pure and near-azeotropic refrigerants in microfin tubes: A new computational procedure

Abstract

Microfin tubes are widely used in air cooled and water cooled heat exchangers for heat pump and refrigeration applications during condensation or evaporation of refrigerants. In order to design heat exchangers and to optimize heat transfer surfaces, accurate procedures for computing pressure drops and heat transfer coefficients are necessary. This paper presents a new simple model for the prediction of the heat transfer coefficient to be applied to condensation in horizontal microfin tubes of halogenated and natural refrigerants, pure fluids or nearly azeotropic mixtures. The updated model accounts for refrigerant physical properties, two-phase flow patterns in microfin tubes and geometrical characteristics of the tubes. It is validated against a data bank of 3115 experimental heat transfer coefficients measured in different independent laboratories all over the world including diverse inside tube geometries and different condensing refrigerants among which R22, R134a, R123, R410A and CO{sub 2}. (author)
Authors:
Cavallini, A; Del Col, D; Mancin, S; Rossetto, L [1] 
  1. Dipartimento di Fisica Tecnica, University of Padova, Via Venezia 1, Padova 35131 (Italy)
Publication Date:
Jan 15, 2009
Product Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Refrigeration; Journal Volume: 32; Journal Issue: 1; Other Information: Elsevier Ltd. All rights reserved
Subject:
42 ENGINEERING; VAPOR CONDENSATION; REFRIGERANTS; AZEOTROPE; HEAT TRANSFER; CARBON DIOXIDE; HEAT EXCHANGERS; TUBES; AIR; MATHEMATICAL MODELS; PRESSURE DROP; TWO-PHASE FLOW; EVAPORATION; GEOMETRY; MIXTURES; REFRIGERATION; WATER; HEAT PUMPS; PHYSICAL PROPERTIES; DESIGN; SURFACES; USES; Heat exchanger; Microfin tube; Calculation; Heat transfer; Pressure drop; Refrigerant; Carbon dioxide
OSTI ID:
21117894
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0140-7007; IJRFDI; TRN: GB08V5346
Availability:
Available from: http://dx.doi.org/10.1016/j.ijrefrig.2008.08.004
Submitting Site:
GB
Size:
page(s) 162-174
Announcement Date:
Jan 21, 2009

Citation Formats

Cavallini, A, Del Col, D, Mancin, S, and Rossetto, L. Condensation of pure and near-azeotropic refrigerants in microfin tubes: A new computational procedure. United Kingdom: N. p., 2009. Web. doi:10.1016/J.IJREFRIG.2008.08.004.
Cavallini, A, Del Col, D, Mancin, S, & Rossetto, L. Condensation of pure and near-azeotropic refrigerants in microfin tubes: A new computational procedure. United Kingdom. doi:10.1016/J.IJREFRIG.2008.08.004.
Cavallini, A, Del Col, D, Mancin, S, and Rossetto, L. 2009. "Condensation of pure and near-azeotropic refrigerants in microfin tubes: A new computational procedure." United Kingdom. doi:10.1016/J.IJREFRIG.2008.08.004. https://www.osti.gov/servlets/purl/10.1016/J.IJREFRIG.2008.08.004.
@misc{etde_21117894,
title = {Condensation of pure and near-azeotropic refrigerants in microfin tubes: A new computational procedure}
author = {Cavallini, A, Del Col, D, Mancin, S, and Rossetto, L}
abstractNote = {Microfin tubes are widely used in air cooled and water cooled heat exchangers for heat pump and refrigeration applications during condensation or evaporation of refrigerants. In order to design heat exchangers and to optimize heat transfer surfaces, accurate procedures for computing pressure drops and heat transfer coefficients are necessary. This paper presents a new simple model for the prediction of the heat transfer coefficient to be applied to condensation in horizontal microfin tubes of halogenated and natural refrigerants, pure fluids or nearly azeotropic mixtures. The updated model accounts for refrigerant physical properties, two-phase flow patterns in microfin tubes and geometrical characteristics of the tubes. It is validated against a data bank of 3115 experimental heat transfer coefficients measured in different independent laboratories all over the world including diverse inside tube geometries and different condensing refrigerants among which R22, R134a, R123, R410A and CO{sub 2}. (author)}
doi = {10.1016/J.IJREFRIG.2008.08.004}
journal = {International Journal of Refrigeration}
issue = {1}
volume = {32}
place = {United Kingdom}
year = {2009}
month = {Jan}
}